@font-face{font-family:'DM Sans';font-style:normal;font-weight:100 1000;font-display:swap;src:url('./fonts/dm-sans-latin-wght-normal.woff2') format('woff2')}@font-face{font-family:'Manrope';font-style:normal;font-weight:200 800;font-display:swap;src:url('./fonts/manrope-latin-wght-normal.woff2') format('woff2')}
:root{--bg:#f6f6f0;--paper:#fff;--ink:#20251e;--muted:#70776c;--line:#e3e6da;--green:#d6f94c;--blue:#3457da;--radius:20px;--sidebar:236px;font-family:'DM Sans',system-ui,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}button{color:inherit}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #3457da;outline-offset:4px}button{border:0;background:none}a{text-decoration:none}h1,h2,h3,p{margin:0}h1,h2,h3,.brand{font-family:'Manrope',system-ui,sans-serif}svg{display:block;flex-shrink:0}small{font-size:12px}.skip-link{position:fixed;top:-60px;left:20px;background:var(--ink);color:white;padding:12px;z-index:100}.skip-link:focus{top:12px}.app-shell{display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr);min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar);padding:36px 23px 24px;border-right:1px solid var(--line);display:flex;flex-direction:column;background:var(--bg);z-index:10}.brand{display:flex;gap:8px;align-items:center;font-weight:800;font-size:26px;letter-spacing:-1.6px}.brand-symbol{background:var(--green);border-radius:10px;width:35px;height:35px;display:grid;place-items:center;transform:rotate(-7deg)}.brand small{align-self:flex-start;margin-top:-2px;letter-spacing:0;font-weight:500;font-family:'DM Sans',sans-serif;font-size:10px}.nav-label{font-size:10px;font-weight:700;letter-spacing:1.7px;color:var(--muted);margin:50px 14px 14px}.nav{display:grid;gap:7px}.nav-item{display:flex;align-items:center;gap:12px;padding:13px 14px;border-radius:10px;font-size:14px;text-align:left;color:#697060;font-weight:550;position:relative}.nav-item.active{background:#e9eddf;color:var(--ink);font-weight:700}.nav-item:hover{background:#ecefe4}.nav-item .count{margin-left:auto;font-size:11px;background:#fff;border-radius:6px;padding:2px 5px}.nav-divider{height:1px;background:var(--line);margin:20px 10px}.nav-later{font-size:9px;border:1px solid #d7ddcd;border-radius:4px;padding:2px 4px;margin-left:auto;letter-spacing:.4px}.sidebar-spacer{flex:1;min-height:32px}.plan-card{border-radius:14px;background:#fff;border:1px solid var(--line);padding:15px}.plan-title{display:flex;align-items:center;justify-content:space-between;font-size:13px;font-weight:700}.plan-title span{font-size:10px;color:var(--muted);font-weight:400}.usage-track{height:5px;background:#eef0e8;border-radius:3px;margin:12px 0 7px;overflow:hidden}.usage-fill{height:100%;background:var(--blue);border-radius:3px}.plan-card small{color:var(--muted);font-size:11px}.plan-upgrade{background:var(--green);width:100%;margin-top:14px;border-radius:8px;font-size:12px;font-weight:700;padding:11px;display:flex;gap:8px;align-items:center;justify-content:center}.sidebar-bottom{display:flex;align-items:center;gap:9px;font-size:12px;margin:20px 3px 0;color:#70776c}.avatar{display:grid;place-items:center;background:#e8ebdf;width:29px;height:29px;border-radius:50%;font-size:11px;font-weight:700;color:var(--ink)}.workspace{grid-column:2;min-width:0}.topbar{height:87px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding:0 42px}.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}.breadcrumb strong{color:var(--ink);font-weight:500}.top-actions{display:flex;align-items:center;gap:15px}.prototype-pill{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:100px;padding:6px 10px;font-size:10px;color:var(--muted);white-space:nowrap}.status-dot{width:5px;height:5px;background:#63843e;border-radius:50%}.icon-button{width:35px;height:35px;display:grid;place-items:center;border:1px solid var(--line);background:white;border-radius:9px}.main{max-width:1410px;padding:34px 42px 48px;margin:0 auto}.greeting{font-size:13px;color:var(--muted);margin-bottom:18px}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:28px;min-height:255px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:1.6px}.hero h1{font-size:clamp(36px,4vw,57px);font-weight:800;line-height:1.12;letter-spacing:-2.8px;margin:13px 0 16px;max-width:650px}.hero h1 .underlined{position:relative;display:inline-block;isolation:isolate}.hero h1 .underlined:after{content:'';position:absolute;bottom:3px;left:-4px;right:-5px;height:17px;background:var(--green);z-index:-1;transform:rotate(-1.7deg)}.hero p{font-size:13px;line-height:1.7;color:#6e7667;max-width:390px}.hero-note{display:flex;align-items:center;gap:8px;font-size:11px;color:#7b8276;margin-top:18px}.hero-art{position:relative;display:flex;align-items:center;justify-content:center;min-height:244px}.orbit{position:absolute;border:1px dashed #cbd2bb;border-radius:50%;width:290px;height:210px;transform:rotate(-17deg)}.mini-paper{position:relative;transform:rotate(5deg);width:236px;background:#fff;border:1px solid #e3e5dd;border-radius:15px;padding:22px;box-shadow:0 8px 0 -3px #e5e9dc,0 19px 35px #2a39180a}.mini-paper-top{display:flex;justify-content:space-between;font-size:9px;letter-spacing:1.4px;color:#849078}.mini-paper h3{font-size:16px;letter-spacing:-.5px;margin:14px 0 15px}.mini-paper .line{height:6px;border-radius:5px;background:#edf0e8;margin:8px 0}.mini-paper .line.short{width:65%}.mini-check{display:flex;gap:7px;align-items:center;font-size:10px;margin:13px 0;color:#59644e}.mini-check svg{color:#63823c}.next-step{padding:9px 11px;background:#edf1e7;display:flex;align-items:center;justify-content:space-between;font-size:10px;border-radius:6px}.art-star{position:absolute;right:11%;top:14px;color:var(--blue);transform:rotate(8deg)}.art-badge{position:absolute;bottom:20px;left:7%;font-size:11px;background:var(--blue);color:#fff;padding:10px 15px;border-radius:9px;transform:rotate(-8deg);display:flex;gap:7px;align-items:center;box-shadow:0 5px 15px #3457da22}.start-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin:26px 0 31px}.start-card{border:1px solid var(--line);border-radius:15px;padding:21px;display:flex;gap:15px;text-align:left;align-items:flex-start;background:#fff;transition:transform .15s,border-color .15s}.start-card:hover{transform:translateY(-3px);border-color:#afb99e}.start-card.highlight{background:var(--blue);border-color:var(--blue);color:#fff}.start-icon{width:42px;height:42px;display:grid;place-items:center;border-radius:11px;background:#f1f3e9}.highlight .start-icon{background:#ffffff20}.start-card h2{font-size:16px;letter-spacing:-.4px;margin:2px 0 5px}.start-card p{font-size:11px;line-height:1.6;color:#7b8275}.highlight p{color:#dce4ff}.start-card>.arrow{margin-left:auto;align-self:center}.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:17px}.section-head h2{font-size:20px;letter-spacing:-.8px;font-weight:750}.section-head p{font-size:11px;color:var(--muted);margin-top:5px}.level-switch{display:inline-flex;background:#eaede3;border:1px solid #e4e8dc;border-radius:9px;padding:3px;gap:2px}.level-switch button{padding:7px 13px;border-radius:6px;font-size:11px;font-weight:550}.level-switch .selected{background:white;box-shadow:0 1px 3px #20251e15}.subjects{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.subject-card{background:white;border:1px solid var(--line);border-radius:13px;text-align:left;padding:16px;position:relative;transition:transform .15s,border-color .15s}.subject-card:hover{transform:translateY(-3px)}.subject-card.selected{border:1.5px solid var(--ink);padding:15.5px}.subject-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:21px}.subject-icon{font-family:'Manrope',sans-serif;font-size:21px;width:39px;height:39px;border-radius:10px;display:grid;place-items:center;letter-spacing:-1px;font-weight:650}.subject-card h3{font-family:'DM Sans',sans-serif;font-size:12px;font-weight:650}.subject-card p{font-size:10px;color:var(--muted);margin-top:5px}.subject-check{color:#20251e}.builder{padding:18px 20px;margin-top:14px;background:#fff;border:1px solid var(--line);border-radius:13px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;align-items:end;gap:18px}.field label,.field-label{display:block;font-size:10px;color:#697360;font-weight:600;letter-spacing:.25px;margin-bottom:7px}select,input[type=text],input[type=number],textarea{width:100%;padding:11px 12px;background:#fafbf7;border:1px solid #dfe4d7;border-radius:8px;color:var(--ink);font-size:12px;outline-offset:2px}select{min-height:40px}textarea{resize:vertical;min-height:130px;line-height:1.6}.primary{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--ink);color:#fff;border-radius:9px;padding:12px 19px;font-size:12px;font-weight:600;min-height:42px}.primary:hover{background:#394031}.primary.lime{background:var(--green);color:var(--ink)}.primary.blue{background:var(--blue)}.secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid #dfe4d5;background:white;border-radius:8px;padding:11px 15px;font-size:12px;font-weight:550;min-height:40px}.secondary:hover{background:#f2f5e9}.text-button{color:#69775a;font-size:11px;display:inline-flex;align-items:center;gap:5px;padding:4px 0}.text-button:hover{text-decoration:underline}.under-builder{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:10px;font-size:10px;color:#7d8574}.under-builder span{display:flex;align-items:center;gap:5px}.bottom-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:18px;margin-top:31px}.progress-card,.tip-card{border:1px solid var(--line);border-radius:14px;background:#fff;padding:22px}.card-heading{font-size:13px;font-weight:650;display:flex;align-items:center;justify-content:space-between}.card-heading span{color:var(--muted);font-size:10px;font-weight:400}.stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:23px;gap:10px}.stat:not(:last-child){border-right:1px solid var(--line)}.stat strong{display:block;font-family:'Manrope';font-size:26px;font-weight:750;letter-spacing:-1px}.stat span{display:block;font-size:10px;color:var(--muted);margin-top:5px}.tip-card{background:#eef1e5;border-color:#e5e9dc;display:flex;flex-direction:column;justify-content:space-between;gap:16px}.tip-card p{font-size:13px;line-height:1.65;max-width:310px}.tip-card .eyebrow{font-size:9px;color:#707a60}.tip-bottom{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#7d866d}.footer-note{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-top:25px;font-size:10px;color:#8b9282}.footer-note button{font-size:10px;color:#7a846f;padding:0;text-decoration:underline}.page-intro{margin:9px 0 28px}.page-intro h1{font-size:38px;letter-spacing:-1.8px;line-height:1.2;margin:12px 0}.page-intro p{font-size:13px;line-height:1.7;color:var(--muted);max-width:650px}.panel{background:#fff;border:1px solid var(--line);border-radius:17px;padding:26px}.feedback-layout{display:grid;grid-template-columns:1.25fr 1fr;gap:22px;align-items:start}.field+.field{margin-top:18px}.example-buttons{display:flex;align-items:center;flex-wrap:wrap;gap:7px;margin:12px 0 18px}.example-buttons span{font-size:10px;color:var(--muted);margin-right:4px}.chip{display:inline-flex;align-items:center;gap:6px;font-size:10px;border:1px solid var(--line);background:#f7f9f1;border-radius:100px;padding:7px 11px}.chip:hover{border-color:#aebc9a}.upload-label{display:flex;align-items:center;justify-content:center;gap:9px;padding:15px;border:1px dashed #cdd6bf;border-radius:9px;font-size:11px;color:#6f7a61;cursor:pointer;margin:13px 0}.upload-label input{position:absolute;width:1px;height:1px;opacity:0}.fine-print{font-size:10px;line-height:1.7;color:#7b8470}.feedback-submit{display:flex;gap:15px;align-items:center;margin-top:20px}.feedback-preview{background:#eef1e5;border:1px solid #dce4ce;border-radius:17px;padding:26px}.feedback-preview h2{font-size:22px;letter-spacing:-.8px;margin:13px 0}.feedback-preview p{font-size:12px;line-height:1.8;color:#6d775f}.step-list{display:grid;gap:17px;margin-top:25px}.step-item{display:flex;gap:12px;font-size:12px;line-height:1.6}.step-num{background:white;border-radius:8px;width:28px;height:28px;display:grid;place-items:center;font-size:11px;font-weight:700;flex-shrink:0}.step-item strong{display:block;font-size:12px}.step-item small{color:#7b856c;font-size:10px}.notice{font-size:11px;line-height:1.7;background:#f1f4e9;border-radius:9px;padding:13px 15px;color:#62704f;display:flex;gap:9px;align-items:flex-start;margin:15px 0}.notice.blue{background:#eef1ff;color:#5365a2}.notice.warning{background:#fff7e8;color:#936e23}.notice svg{margin-top:2px}.focus-list{display:grid;gap:9px;margin:20px 0}.focus-item{display:flex;align-items:center;gap:10px;font-size:12px;background:#fff;border-radius:9px;padding:12px}.feedback-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.practice-top{display:flex;justify-content:space-between;gap:20px;align-items:center;margin:8px 0 24px}.practice-label{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--muted)}.practice-progress{display:flex;align-items:center;gap:12px;font-size:11px}.progress-dots{display:flex;gap:5px}.progress-dots span{display:block;width:26px;height:4px;border-radius:4px;background:#dfe5d5}.progress-dots span.done{background:#79994a}.progress-dots span.current{background:var(--blue)}.question-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(220px,.7fr);gap:24px;align-items:start}.question-card{padding:33px}.question-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:22px}.tag{font-size:9px;background:#eef1e7;border-radius:5px;padding:5px 8px;color:#667459;letter-spacing:.5px;display:inline-flex;align-items:center;gap:4px}.tag.blue{background:#edf0ff;color:#4c60b1}.tag.green{background:#e5f1da;color:#52763d}.tag.amber{background:#fff1d7;color:#8c7026}.question-prompt{font-family:'Manrope';font-size:21px;line-height:1.65;letter-spacing:-.55px;white-space:pre-wrap;margin-bottom:25px;overflow-wrap:anywhere}.answer-options{display:grid;gap:9px}.answer-option{display:flex;align-items:flex-start;gap:12px;border:1px solid #e1e6d8;border-radius:10px;padding:14px;font-size:13px;line-height:1.5;cursor:pointer;background:#fafbf8}.answer-option:has(input:checked){border-color:var(--blue);background:#f0f3ff}.answer-option input{accent-color:var(--blue);margin-top:3px}.option-letter{background:#e9ede1;width:22px;height:22px;display:grid;place-items:center;border-radius:5px;font-size:10px;flex-shrink:0}.answer-option:has(input:checked) .option-letter{background:#dce4ff;color:#3457da}.answer-input{font-size:19px!important;padding:15px!important}.question-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:24px}.question-actions>div{display:flex;gap:9px}.context-card{border:1px solid var(--line);border-radius:13px;padding:20px;background:#edf0e5}.context-card h3{font-size:13px;margin-bottom:10px}.context-card p{font-size:11px;line-height:1.8;color:#748066}.context-card .text-button{margin-top:14px}.context-card+.context-card{margin-top:14px;background:white}.result-banner{display:flex;gap:10px;align-items:flex-start;padding:16px;border-radius:10px;background:#eaf3e1;color:#4b7035;margin:20px 0}.result-banner.incorrect{background:#fff3df;color:#896a28}.result-banner.neutral{background:#edf0ff;color:#5366aa}.result-banner strong{font-size:13px;display:block}.result-banner p{font-size:11px;line-height:1.7;margin-top:5px}.solution{border-top:1px solid var(--line);padding-top:20px;margin-top:20px}.solution h3{font-size:14px;margin-bottom:12px}.solution p{font-size:12px;line-height:1.85;white-space:pre-wrap;overflow-wrap:anywhere}.solution ol{padding-left:21px;font-size:12px;line-height:1.9}.solution li+li{margin-top:9px}.solution .expected{background:#f3f5ed;padding:13px;border-radius:9px;margin:12px 0;font-weight:600}.rubric-list{display:grid;gap:10px;margin:15px 0}.rubric-item{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:9px;padding:12px;font-size:12px;line-height:1.5;cursor:pointer}.rubric-item input{accent-color:#5a8038;margin-top:3px}.rubric-item small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.summary-hero{background:var(--blue);color:white;border-radius:18px;padding:34px;display:flex;justify-content:space-between;gap:30px;align-items:center;margin:12px 0 24px}.summary-hero h1{font-size:35px;letter-spacing:-1.5px;margin:13px 0}.summary-hero p{font-size:12px;color:#d5defc;line-height:1.8}.summary-stat{font-family:'Manrope';font-size:52px;letter-spacing:-2px;white-space:nowrap}.summary-stat small{display:block;font-family:'DM Sans';letter-spacing:0;font-size:10px;color:#d5defc;text-align:center}.review-list{display:grid;gap:12px}.review-item{border:1px solid var(--line);border-radius:12px;background:white;overflow:hidden}.review-item summary{display:flex;gap:13px;align-items:center;padding:17px;cursor:pointer;font-size:12px;line-height:1.6;list-style:none}.review-item summary::-webkit-details-marker{display:none}.review-item summary>span:nth-child(2){flex:1}.review-item summary .tag{white-space:nowrap}.review-detail{padding:0 22px 22px 53px}.review-detail p,.review-detail ol{font-size:12px;line-height:1.8;white-space:pre-wrap}.review-detail h3{font-size:12px;margin:13px 0 7px}.summary-actions{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0}.empty-state{text-align:center;padding:58px 30px;background:white;border:1px solid var(--line);border-radius:17px}.empty-icon{background:#eef2e4;border-radius:20px;width:72px;height:72px;display:grid;place-items:center;margin:0 auto 20px}.empty-state h2{font-size:23px;letter-spacing:-.7px;margin-bottom:10px}.empty-state p{font-size:12px;color:var(--muted);line-height:1.8;max-width:430px;margin:0 auto 24px}.mistake-grid{display:grid;gap:14px}.mistake-card{background:white;border:1px solid var(--line);border-radius:14px;padding:22px}.mistake-card h3{font-size:14px;line-height:1.7;margin:14px 0}.mistake-card .mistake-actions{display:flex;justify-content:space-between;gap:10px;margin-top:16px;align-items:center}.mistake-card details{font-size:11px;color:var(--muted);line-height:1.8}.mistake-card details p{white-space:pre-wrap;margin-top:10px}.mistake-title{display:flex;justify-content:space-between;align-items:center}.plan-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}.pricing-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:15px;padding:24px;display:flex;flex-direction:column}.pricing-card.featured{border:1.5px solid var(--ink);background:#f5fadf}.price-label{font-size:10px;font-weight:700;letter-spacing:1px;margin-bottom:20px}.price{font-family:'Manrope';font-size:34px;letter-spacing:-1.5px;font-weight:800;line-height:1}.price span{font-family:'DM Sans';font-size:11px;letter-spacing:0;font-weight:400;color:var(--muted)}.price-sub{font-size:10px;color:var(--muted);margin:9px 0 18px}.pricing-card ul{padding:0;list-style:none;display:grid;gap:12px;margin:0 0 24px;flex:1}.pricing-card li{font-size:11px;line-height:1.6;display:flex;gap:8px}.pricing-card li svg{margin-top:2px;color:#68834b}.pricing-card .primary,.pricing-card .secondary{width:100%}.popular-badge{position:absolute;top:-11px;right:18px;background:var(--ink);color:white;border-radius:5px;padding:5px 9px;font-size:9px}.teacher-preview{background:var(--blue);border-radius:20px;padding:38px;color:white;max-width:900px;position:relative;overflow:hidden}.teacher-preview h1{font-size:43px;letter-spacing:-2px;max-width:530px;line-height:1.2;margin:20px 0}.teacher-preview p{font-size:13px;color:#d4ddff;line-height:1.8;max-width:560px}.teacher-points{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:30px}.teacher-point{border:1px solid #ffffff36;border-radius:11px;padding:17px;font-size:11px;line-height:1.8}.teacher-point svg{margin-bottom:12px;color:var(--green)}.teacher-point strong{display:block;font-size:12px;margin-bottom:5px}.teacher-notice{margin-top:25px;font-size:10px;color:#e0e7ff}.mobile-brand,.mobile-menu{display:none}.modal-overlay{position:fixed;inset:0;background:#20251e65;backdrop-filter:blur(4px);z-index:100;display:flex;justify-content:center;align-items:center;padding:24px}.modal{position:relative;background:var(--bg);border-radius:22px;width:min(880px,100%);max-height:90vh;overflow-y:auto;padding:34px;box-shadow:0 25px 100px #0002}.modal.small{width:min(520px,100%)}.modal h2{font-size:28px;letter-spacing:-1px;margin:12px 0}.modal>p{font-size:12px;line-height:1.8;color:var(--muted)}.modal-close{position:absolute;top:17px;right:17px;width:30px;height:30px;border-radius:50%;background:#e8eddf;display:grid;place-items:center}.modal .plan-list{gap:11px}.modal .pricing-card{padding:20px}.modal .price{font-size:29px}.checkout-summary{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--line);background:white;border-radius:11px;padding:20px;margin:22px 0}.checkout-summary strong{font-size:15px}.checkout-summary small{display:block;margin-top:5px;color:var(--muted)}.modal-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}#toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);z-index:200;background:var(--ink);color:white;padding:13px 20px;border-radius:10px;font-size:12px;box-shadow:0 8px 35px #0002;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:min(500px,90vw);line-height:1.6}#toast.visible{opacity:1;transform:translate(-50%,0)}.error-text{font-size:11px;color:#9c402d;margin-top:8px;line-height:1.6}.muted{color:var(--muted)}.spaced{margin-top:20px}.session-list{display:grid;gap:12px;margin-top:22px}.session-item{border:1px solid var(--line);background:white;border-radius:10px;padding:16px 18px;display:flex;align-items:center;gap:12px;text-align:left}.session-item>span:nth-child(2){flex:1}.session-item strong{font-size:12px;display:block}.session-item small{display:block;color:var(--muted);font-size:10px;margin-top:5px}.loading-screen{min-height:100vh;display:grid;place-items:center}
@media(min-width:1500px){.main{padding-top:45px}.hero{min-height:300px}.hero-art{min-height:280px}.subjects .subject-card{padding:22px}.subject-card.selected{padding:21.5px}.start-grid{margin-top:36px}}
@media(max-width:1150px){:root{--sidebar:208px}.sidebar{padding:30px 16px 20px}.brand{font-size:24px}.main{padding:28px}.topbar{padding:0 28px}.hero h1{font-size:44px}.hero-art{transform:scale(.9)}.builder{grid-template-columns:1fr 1fr}.builder>.primary{grid-column:1/-1}.subject-card{padding:13px}.subject-card.selected{padding:12.5px}.question-layout{grid-template-columns:minmax(0,1fr)}.question-side{display:grid;grid-template-columns:1fr 1fr;gap:14px}.context-card+.context-card{margin:0}.bottom-grid{grid-template-columns:1fr 1fr}.hero{grid-template-columns:1.3fr 1fr}.plan-list{gap:10px}.pricing-card{padding:19px}}
@media(max-width:850px){:root{--sidebar:0px}.app-shell{display:block}.sidebar{transform:translateX(-100%);width:240px;transition:transform .2s;box-shadow:20px 0 70px #20251e22}.sidebar.open{transform:translateX(0)}.workspace{width:100%}.topbar{height:72px;padding:0 22px}.mobile-brand{display:flex;font-size:23px}.mobile-brand .brand-symbol{width:30px;height:30px}.mobile-menu{display:grid}.breadcrumb{display:none}.main{padding:25px 22px}.top-actions{gap:8px}.hero h1{font-size:48px}.hero-art{transform:scale(.95)}.hero{min-height:245px}.section-head h2{font-size:20px}.subject-card p{font-size:9px}.footer-note{flex-wrap:wrap}.plan-list{grid-template-columns:1fr}.pricing-card ul{grid-template-columns:1fr 1fr;gap:10px}.modal .plan-list{grid-template-columns:1fr}.feedback-layout{grid-template-columns:1fr}.feedback-preview{order:2}.teacher-preview h1{font-size:37px}.modal{padding:27px}.modal h2{padding-right:25px}}
@media(max-width:580px){.topbar{padding:0 17px}.prototype-pill{font-size:9px;padding:5px 7px}.top-actions>.avatar{display:none}.main{padding:24px 17px 36px}.hero{grid-template-columns:1fr;gap:0;min-height:0}.hero h1{font-size:45px;letter-spacing:-2.4px}.hero-art{display:none}.hero p{font-size:12px;max-width:320px}.greeting{font-size:12px;margin-bottom:20px}.start-grid{grid-template-columns:1fr;margin:25px 0 28px;gap:10px}.start-card{padding:17px}.start-card h2{font-size:15px}.start-card p{font-size:11px}.section-head{align-items:flex-start;gap:10px}.section-head h2{font-size:19px}.section-head p{font-size:10px;line-height:1.5}.level-switch button{padding:7px 9px;font-size:10px}.subjects{grid-template-columns:repeat(2,1fr);gap:10px}.subject-card{padding:15px}.subject-card.selected{padding:14.5px}.subject-top{margin-bottom:15px}.subject-card h3{font-size:12px}.subject-card p{font-size:10px}.builder{padding:16px;gap:14px}.under-builder{flex-wrap:wrap;line-height:1.6}.bottom-grid{grid-template-columns:1fr;gap:12px;margin-top:23px}.progress-card,.tip-card{padding:19px}.stats{margin-top:20px}.tip-card p{font-size:12px}.page-intro h1{font-size:32px}.panel,.feedback-preview{padding:20px}.question-card{padding:22px 19px}.question-prompt{font-size:18px;line-height:1.75}.question-actions{align-items:stretch;flex-direction:column}.question-actions>div{justify-content:space-between}.question-actions>.primary{width:100%}.question-side{grid-template-columns:1fr}.practice-top{align-items:flex-start;gap:12px;flex-direction:column}.practice-progress{width:100%;justify-content:space-between}.question-meta{gap:5px;flex-wrap:wrap}.summary-hero{padding:26px;align-items:flex-start;flex-direction:column;gap:18px}.summary-hero h1{font-size:30px}.summary-stat{font-size:40px}.summary-stat small{text-align:left}.summary-actions>*{width:100%}.review-item summary{padding:14px;flex-wrap:wrap}.review-item summary>span:nth-child(2){min-width:70%}.review-detail{padding:0 18px 18px}.teacher-preview{padding:26px}.teacher-preview h1{font-size:34px}.teacher-points{grid-template-columns:1fr}.pricing-card ul{grid-template-columns:1fr}.modal-overlay{padding:12px}.modal{padding:25px 20px;max-height:94vh;border-radius:16px}.modal h2{font-size:25px}.feedback-submit{align-items:flex-start;flex-direction:column}.feedback-submit .primary{width:100%}.footer-note{line-height:1.8}.price{font-size:32px}.session-item{padding:14px}.session-item .tag{font-size:8px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;scroll-behavior:auto!important}}